Mechanical Impedance Today

Abstract

During the past several years, there has been considerable interest in the study and use of mechanical-impedance techniques. A number of workers concerned with shock or vibration problems have recognized the inherent potentialities of this approach. However, the practicing engineer has seen but few results that aid in solving his problems. At least in part, this is because of some misconceptions of what these techniques can do; also, there exist certain limitations and uncontrolled variables that restrict the accuracy and/or usefulness of impedance measurements. Even though slow, there is significant research in progress that either utilizes impedance methods or expands the knowledge base required before the engineer can use the procedures with confidence. This paper reviews some of these research results and attempts to identify problem areas that require further study.